Indicator for rotary churns.



G. M` CARLSON. INDICATOR FOR ROTARY CHURNS.

APPLIOATION FILED AUG. 28, 1912.

1,086,438. l Patented Feb-10,1914.

CARL M. CARLSON, OF OWATONNA, MINNESOTA.

INDICATOR FOR ROTARY CHURNS.

Specification of Letters Patent.

Application filed August28, 1912.

Patented Feb. 1o, 1914.-.

serial Ne. 717,447.

To all whom it may concern Be it known that I, CARL M. CARLSON, a citizen of the United States, residing at watonna, Yin the county of Steele and State of Minnesota, have invented certain new and .useful Improvements in Indicators for Rotary Churns; and I- do hereby declare the following to be a full, clear, and exact description. of the invention, such as will enable others skilled in the art to which it ap ertains to make and use the same.

; Y y,44 invention has for its object to provide an improved indicator, especially adapted for use on rotary ,churns for sounding an alarm -to .remind the attendant that a pre-determined number of revolutions of the said churn have `been completed; and ftothis end, the invention consists ofthe novel devices and combinations of devices yhereinafter described in the claims.

The invention is illustrated in the-accompanying drawings, wherein like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view in sideelevation of a rotary churn, having applied thereto the improved indicator, some parts of the churn being broken away and some of the exposed parts being shown in section; Fig. 2 is a front view of the improved indicator, on an enlarged scale, some parts thereof being broken away and some of the exposed parts being shown in section; and Fig. 3 is a view principally in edge ele vation but with some parts shown in vertical section, taken on the irregular line ma .m3 of Fig. 2.

Of the parts of the rotary churn shown, for the purpose ofillustrating the improved indicator in working position, the numeral 1 indicates one end of a horizontally eX ltended drum, having secured to thehead thereofl atrunnion 2, journaled in one end of a suitable supporting frame 3.

The parts thus far described .maybe of the standard or of any desired make, and the drum 1 may be driven by any suitable means, not shown.

Referring'to my improved indicator, the numeral 4 indicates an annular heador base plate secured, by screws or otherwise, to the outer face of the head of the drum l'at a point eccentric to the trunnion 2. This base plate 4 is provided, at its aXis, with a horizontally extended trunnion 5, having journaled thereon, for a limited swinging movement, a pendulum G. A pair of circumferentially spaced stop lugs 7 and S, between which a pendulum 6 swings, are cast integral with the base plate 4, and. serve to limit the swinging movement .of the pendulum 6. Also journaled on the trunnion 5 outward of the pendulum 6 is an indicator wheel 9. This wheel 9 and the pendulum 6 are held against lateral movement on the trunnion 5 by a machine screw 10, having sc rew threaded engagement with the trunmon 5, and a coperating washer 11.

On the back of the indicator wheel 9 and at the outer edge thereof are cut or otherwise formed ratchet teeth 12 in annular arrangement, and each one of which represents one revolution of the drum, as will presently appear. The number of ratchet teeth 12 is indicated by numerals, stamped or otherwise marked on the outer face of the indicator 'wheel 9 and directly opposite the ratchet teeth 12. As shown, these nu .merals run from 0 to 75, and indicate every fth ratchet tooth.

The indicator wheel 9 is given a step by step movement in the direction of the arrow marked thereon, in- Fig. 2, by'a driving dog 14, pivotally secured to and between a pair of lugs 15, cast integral with the pendulum t5. This driving dog 14 is yieldingly held 1n engagement with and for action on the ratchet teeth 12 by a small coiledspring 16, i

compressed between the pendulum 6 and the indicator wheel 9.

Coperating with the ratchet wheel 12, to prevent accidental backward movement of the indicator wheel 9,'is a spring pressed rctaining dog 17, pivotally secured to a lug 18, cast integral with Vthe .bearing plate 4.

An alarm device, arranged to be actuated at the com `letio-n of a certain pre-determined number o revolutions of the drum 1, is secured to'the pendulum 6. As shown, this alarm device is preferably inthe form of a spring actuated bell, indicated as an entirety by the numeral 19, and of the'type commonly known as a bicycle bell. For the purpose of this case, it is not thought necessary to fully illustrate said bell,l but it may be here stated that its actuating spring, not

shown, is set under tension by rotating the top ofthe bell with respect to its fixed or base portion. This actuating'spring isset in motion by a plunger 20, carried by the base or fixed portion of the bell. Secured to the indicator wheel 9 and located at the zero point of the numerals marked thereon is a bell actuating device in the form of a cam head 21, arranged to travel over the free or outer endof the plunger 20, at the end of the pre-determined number of revolutions of the drum 1, and thereby depress the' plunger to release the bell actuating spring. r1`he cam head21 is provided with a slotted arm 22, through which projects a nut-equipped stud bolt 23, rigidly secured to the outer face of the indicator wheel 9, and projecting laterally therefrom. Obviously, by means of the slotted arm 22, and

, purpose of in close engagement with the stop lug 7, a swinging arm 24 is pivota'lly secured at 25 to tions,

the base plate 4., At its free end, this arm4 .'24 is provided with a laterally projecting cam extension 26 adapted to be moved into engagement with one of the lateral end eX-l tensions ofthe pendulum 6.

The operation of the improved device may be briefly stated as follows: The indicator Wheel 19 is first set in a position corresponding to the knumber of revolutions it is desired to give the churn; for instance, if it is desired to give the churn thirty-tive revolu- 'the indicator wheel 9 is turned to a position to bring the ratchet tooth 12, which is directly back of the numeral 35, into engagement. with the driving dog 14. The

' driving meansfor-the drum 1 is then set in motion. Obviously, during each revolution of the drum 1, the pendulum 6 carried there- 'by will make one complete rotation around thev drum trunnion 2. During this rotation of the pendulum 6, the same Willalso have, l under the action of gravity, a limited swing- Y ing movement onits pivotal support 5, with .respect to the drum 1. In the drawings, the pendulum 6 is shown at its highest point of travel, as the same is moved around the v drum trunnion 2, and in engagement with the stop lug 7. As the pendulum 6 is carried downward from this point by the drum .1, the same will, under the action of gravity,

`drop at a faster speed than the travel of the drum 1, untilfit is lstopped by the lug 8.

During this movement of the pendulum (3, the driving dog 14 carried by said pendulum will slip-over one of the ratchet teeth 12, and the rindicator wheel 9,4 is held against movement therewith by the retaining dog 17.

The pendulum 6 continues in engagement with the stop lug 8 until the same reaches its lowest point of travel as it is moved around the drum trunnion 2. As the pendulum 6 is carried upward from this point by the drum 1, said pendulum, under the l by the driving Lose-iss action of gravity, will drop back in respect to the travel of the drum 1, out of engagement with Nthe lug 8 and into engagement with the lug. 7 z During this backward movement of the pendulum 6, the indicator wheel 9 will'also be moved therewith by the driving dog 14, thus moving the cam head 21 one step nearer the bell actuating plunger 20. As the indicator wheel 12 is advanced dog 14, its ratchet teeth will slip over the retaining dog 17. After the drum 1 has made within about two of the required number of' revolutions, the cam head 21 will engage the plunger 20 and, as the drum 1 continues to rotate, the said plunger 21 will be completely depressed, thereby actuating the bell 19, to notify the attendant that the drum 1 has made the required number of revolutions.

The. above `described device, while eX- tremely simple and of comparatively small cost to manufacture, has, in actual usage, been found highly eiiicient for the purpose yhadrin view.

What I claim is:

1. The combination with a rotary body, of a pendulum carried by said body, an alarm device carried by said pendulum, an indicator actuated by said pendulum, and means carried by said indicator for actuating said alarm device, at the end of a pre-determined number of revolutions of said body.

2. The combination with a rotary drum, of a pendulum carried.by said drum, an alarm device carried by said pendulum, an indicator actuated by said pendulum, and

adjustable means carried by said indicatorl for actuating said alarm device, at the end of a pre-determined number of Arevolutions of said drum.

3. rlhe combination with a rotary drum, of a pendulum and an indicator wheel carried by said drum, ratchet' teeth on said indicator wheel, a driving dog carried by said pendulum, and 'operative onsaid ratchet teeth, to impart a step by step movement to said indicator wheel, a retaining dog carried `by said drum, and operative on said ratchet teeth, and an alarm device carried by said pendulum,.and means carried by said indicator wheel for actuating said alarm device, at the end of a pre-determined number of revolutions of said drum.`

' 4. The combination with a rotary drinn, of a trunnion on said drum, a pendulum andan indicator wheel journaled on said trunnion, stops for limiting the swinging' movement of said pendulum, a driving dog carried by said pendulum, and operative on said ratchet teeth to impart a step by step -movement to said indicator wheel, a retaining dog, carried by said drum, and operative on said ratchet teeth, a bell carried by said pendulum, and a cam head carried by said indicator wheel for actuating said bell, at

the end of a pre-determined number of revolutions of said drum.

5.`The combination witha rotary drum, of a trunnion on said drum, a pendulum and an indicator wheel journaled on said trunnion, stops for limiting the swinging movement of said pendulum, a driving dog carried by said pendulum, and operative on said ratchet teeth to impart a step by step movement to said indicator wheel, a retaining dog, carried by said drum, and operative on said ratchet teeth, a spring actuated plunger-equipped bell, carried by said pendulum, an adjustablecam head carried by said indicator wheel and arranged tedepress said plunger, at the end ot a pre-determined number of revolutions of said drum for actuating said bell.

plunger-equipped bell, carried by said pendulum, an adjustable cam head'carried by said indicator wheel and arranged to depress said plunger, at the end of a pre-de` termined number of revolutions of said drum for actuating said bell, and means for locking said pendulum against swinging movement.

In testimon whereof I alix my signature in presence o .two witnesses.

- CARL M. CARLSON. Witnesses W. C. MoATs, R. B. DIsBRow. 

